Josef korbuly



Nrrnn i ATENT OFFICE.

JOSEF KORBULY, OF BUDA-PESTH, AUSTRIA-HUNGARY.

' AXLE-BOX FO R RAI LWAY-CARRIAG ES.

SPECIFICATION forming part of Letters Patent No. 558,693, dated April21, 1896.

Application filed February l5, 1895. Serial No. 538,543. (No model.)Patented in Germany October l, 1894,110. 77,316.

To all whom it may concern:

Be it known that I, JOSEF KORBULY, of Buda-Pesth, in the Empire ofAustria-Hungary, have invented Improved Axle-Boxes for Railway-Carriages, (patented in Germany October 1, 1894, No. 77,316,) of whichthe following is a specification, reference being had therein to theaccompanying drawings.

This invention relates to axle-boxes of an improved constructionoffering the most important advantages, of which the following is abrief enumeration. x

First, the journal of the axle is protected from the injurious effect ofshocks or vibration; second, the bush of the bearing is made movable asreadily as possible; third, the

wear of the rolling or contact surfaces is reduced; fourth, speciallubricating devices of any descriptionnsuch as pads, wicks, or thelike-may be dispensed with; fifth, the axlejournals are not liable toinjury if the bear ing should become heated while the carriage is inmotion, and, sixth, the bearing is effectively protected from dust andimpurities.

The invention will be best understood by reference to the accompanyingdrawings, in

Figure 1 is a vertical section of the improved axle-box. Fig. 2 is afront View thereof. Fig. 3 is a sectional plan or top view. Fig. 4c is asection on line a? x, Fig. 1. Figs. 5 and 6 are views corresponding topart of Fig. 1 and illustrating other forms of the invention, and Figs.7 to 13 are detail views.

The case of the bearing, which is so constructed as to accommodaterailway-carriages of the usual construction,consists of the front a andback b. Both are connected over the center of the journal by verticaliianges c and screws d.

The bearing proper consists of two caps e, as shown in Fig. 9 incross-section, while Fig. lO is a view of the interior of the same, Fig.11 a side View, and Fig. 12 a longitudinal section. These caps surroundthe journal completely and are sufficiently recessed or hollowed out toenable the journal to revolve in them with ease. O11 the outside theyare turned slightly taper toward the end of the axle. After these capshave been placed upon the axle a compressing or tightening-sleeve f ispassed over them, so that both caps are firmly retained in position.Screws g, Figs. 3 and 9, serve to prevent the tighteningsleeve fromturning and altering its position in relation to said caps. In thecenter of the sleeve is provided an annular rib or bead h, whereon apresser c' is placed. The presser is einbedded in the two halves a andZi of the easing and is retained in place by them when they are screwedtogether. The pressure of the springs of the vehicle is exercised in thefirst place upon the upper enlargement k of the casing, and istransmitted hence to the presser c', the tightening-sleeve f, the capsof the bearing, and, lastly, from the caps to the axle. The presser isprovided on its inner side with a recess corresponding in shape to therounded projecting bead, which accordingly engages therein in such amanner that the requisite freedom of displacement in relation to thecase of the bearing is afforded to both the tightening-sleeve fand thecaps. As the caps and sleeve are not rigidly connected with the casing,it follows that in case of any con cussion or vibration occurring whilethe carriage is in motion the said caps will slightly turn upon thejournal, whereby uniformity in the wear of the contact-surfaces withinthe caps is insured.

Vhen the bearing becomes heated through friction, the increased frictionwhich ensues between the journal and the caps of the bearing causes thetightening-sleeveto be turned along with the journal. The grating noiseproduced by the friction between the bead of the tightening-sleeve andpresser i will cause the fact that the bearing has become hot to beaudibly notified, so that it becomes perceptible at a distance and stepscan be taken to avert any possible danger or evil conse quences.

A A are grooves in the casing or box of the axle. In these groovesslides the axle-fork of any usual construction. (Not shown.) Underneaththe said grooves at A', Fig. 3, the materia-l of the casing has aswelling or enlarged portion, owing to which, in case of concussion andwhen the shocks sustained are communicated to the casing through theaxle-fork, the thickened portion A' rests against thetightening-sleevef, whereby those parts of the casing which are not sostrong are protected from the effect of the shocks, and any breakage ofthe casing is obviated. Lubricating-oil is admitted into the .axleboxupon the screw I, Fig. 1, being loosened, when the whole of the casingis filled with oil IOO ros

' is embedded in an annular groove n provided `illustrated in Fig. 5.

in the casing. By means of a device shown in Figs. 4, 7, and S theflexible ring is con stantlyf and uniformly pressed against the journaland against the sides of the said annular groove, so that a thoroughlyeffective packing is obtained. To avoid complication in the drawingsthis arrangement has been omitted from Fig. 1, while in Fig. 4 thepacking-ring is not shown. The said ring should preferably consist oftwo leather washers 0 o', which are so pressed or molded as to present asquare sectional area open on one side. They are then fitted within eachother in such a manner that they inclose a ring o2 of felt or the like(also of square section) between them, or a hollow ring o3, Fig. 13, ofindiarubber, may be employed for filling up the space between thewashers and as an advantageous substitute for the ring o2, in which casethe hollow ring may be filled or inflated with compressed air. Aroundthe outer ring is passed a compressing-band p, the ends of which areintroduced into a casing or chamber q, the lower part of which issupported by aresilient or spring-controlled plate y', adhering to thecircumference of the ring. A binding or tightening screw r is passedthrough the top of the said case q and prevented from slipping out ofthe case accidentally by the insertion of a peg or bolt 1". Onto thescrew r is movably iitted a nut s, which is so guided by the sides ofthe case q as to be effectively hindered from revolving. The ends of thecompressing-band p are secured to the nut s, so that by turning thescrew r they are either tightened or loosened, whereby the ring locatedwithin the groove is compressed more or less and brought intocorrespondingly close contact with the part m of the axle.

The case q is adjustably guided in the vertical direction within a lidor cover u, which is secured upon the back b of the case of theaxle-box. The small case, and consequently the compressing band or strapp also, and the annular packing are hindered from participating in therotation of the axle, and in order to avoid raising the said lid uwhenever the screw r is turned such lid carries in its center ascrew-plug u', upon the removal of which the screw r may be turned bymeans of a Spanner.

Where the axle has very wide journal-bases the case may be constructedin the manner In this arrangement there are provided twol annulargrooves a in juxtaposition, and in these grooves may be embedded packingdevices such as have been described above.

Vhere smaller journal-bases are used or where they have been shortenedthrough wear, the modiiied arrangement, of which Fig. 6 is a transversesection, may be employed. In this case the ring o, having iirst beenheated, is passed over the journal, such ring being provided on itsperiphery with an annular groove. Into this groove is inserted apacking-ring of corresponding shape. The tightening device to be usedhere is the same as that which is above described.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is

l. In an axle-box the combination of a casing, caps adapted to surroundthe journal, and a tightening-sleeve surrounding said caps, guided inthe casing, and adapted to turn with the journal, substantially as setforth.

2. The combination of a casin.g,caps adapted to surround a journal, arotatable tighteningsleeve surrounding the caps and having a bead, and apresser such as t held in the casing and engaging the said bead,substantially as set forth.

3. An-axle-box consistingv of the two halves a and b jointed on avertical plane transverse to the axle, having vertical transversesecuring-flanges c, and forming a closed oil-chamber, the outer halfhaving a closed end integral with its cylindrical portion, substantiallyas set forth.

4. The combination of a casing forming an Oil-reservoir, and having anannular groove opposite the base of the journal, a bearing for thejournal within the casing and having a space between itself and thecasing, a ring in said groove, a band around the ring, and a tighteningmeans mounted in said groove engaging and adapted to draw upon the endsof the band for tightening the band, substantially as set forth.

5. The combination of the casing, the journal, the packing-ring composedof two portions each U -shaped in cross-section and laterally open,iitting one between the iianges of the other and inclosing a softsubstance, and a tightening-band inclosing a ring, substantially as setforth.

6. The combination with the axle-box casing, of the journal, the caps efitting the same, the sleeve f, a packing-ring adapted to surround thejournal, a compressing-band p around the ring, a chamber q, a movablepart s within the latter and connected with the ends of the band, andmeans for moving the said part, substantially as set forth.

In witness whereof I hereunto set my hand in presence of two witnesses.

JOSEF KORBULY. Witnesses:

KARL FRANZ, OTro FABIAN.

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